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A small rectangular microSD card with a standard SD adapter both in black and red finish

SanDisk

SanDisk Extreme PRO 256GB microSDXC UHS-I U3 V30 A2 with adapter

SKU CH-AM5W-H24BB

256GB microSDXC card with UHS-I U3 V30 A2 ratings, up to 170MB/s read and 90MB/s write, includes SD adapter

  • Total capacity256 GB
  • Memory card formatMicroSD
  • Speed classUHS-I / Class 10
  • Max read speed170 MB/S
  • Write throughput90mb/s
  • VariantWith Adapter

Capacity 256GB

  • Transfers 1000 photos and 24GB 4K video in under 3 minutes with 170MB/s read speed
  • Captures fast-action shots and 4K UHD video with 90MB/s write speed
  • Runs reliably from -25°C to 85°C operating temperature
  • Includes adapter for use in standard SD card slots
  • A2 rating speeds up app loading on smartphones and tablets

Capacity and card type

This is a SanDisk Extreme PRO microSDXC card with 256GB capacity. It uses the UHS-I bus and carries Class 10, U3, V30 and A2 speed ratings. A full-size SD adapter is included for devices that accept standard SD slots.

Who this suits and who should look elsewhere

Photographers and videographers shooting 4K UHD footage or fast-action bursts benefit from sustained write speeds up to 90MB/s. Content creators moving large libraries appreciate read speeds up to 170MB/s with a compatible reader. Users whose devices only support microSDHC or lack UHS-I support will not see the rated performance.

Deciding specification

The card delivers up to 170MB/s read and 90MB/s write over a UHS-I interface. This combination determines whether the card can keep pace with your camera's bitrate and whether your host device can realise the transfer rates quoted.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $80.99
Pricier than about 67% of the 1,947 comparable items (median $46.99).
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $316.37 per TB
Cheaper than about 57% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Total capacity256 GB
Product typeMicroSDXC
Performance
Speed classUHS-I / Class 10
Max read speed170 MB/S
Write throughput90mb/s
Storage
Memory card formatMicroSD
More details
VariantWith Adapter

Other versions of this model

3 more in the same range

Questions about this item

Should I pick the 256GB version or a different capacity?

The card is available in 64GB, 128GB, 256GB, 400GB, 512GB and 1TB; choose the size that matches the amount of 4K footage or apps you plan to store.

What does the 170MB/s read speed mean when I copy files to my PC?

You can move roughly 1000 high-resolution photos or 24GB of 4K video in under three minutes with a compatible UHS-I reader.

How does the UHS-I interface affect real-world performance?

UHS-I limits the bus to the speeds shown — up to 170MB/s read and 90MB/s write — so a UHS-II reader will not go faster.

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